- M
- Main stress rule
- Malleus
- Manner of articulation
- Maximal onset principle
- Max-IO
- McGurk effect
- Media
- Median articulation
- Mel scale
- Melodic tier
- Merger
- Mesolect
- Metathesis
- Metrical grid
- Metrical phonology
- Metrical tree
- Micro-intonation
- Microprosody
- Mid Level
- Mid vowel
- Minimal focus
- Minimal pair
- Mirror-image convention
- Missing fundamental
- Modal verb
- Modal voice
- Modulation
- Monophthong
- Monosyllable
- Mora
- Morpheme
- Morpheme boundary
- Morphophonology
- Motor theory
- Murmur